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Structure for improving lateral stiffness of steel frame

A side-shift stiffness, steel frame technology, applied in building components, building structure, earthquake-proof and other directions, can solve the problems of building requirements not well met, support failure, difficult maintenance, etc., to achieve low cost, easy replacement and maintenance. Repair, wide range of effects

Inactive Publication Date: 2018-11-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Central braces add a lot of stiffness, but their braces fail after they yield
Eccentric support can increase the stiffness greatly and has good seismic performance, but because its energy-dissipating components are beams, it is very difficult and expensive to repair
Moreover, these supports cannot meet the requirements of some large-span buildings.

Method used

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  • Structure for improving lateral stiffness of steel frame
  • Structure for improving lateral stiffness of steel frame
  • Structure for improving lateral stiffness of steel frame

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: as figure 1 As shown, the structure of the steel frame lateral displacement stiffness in this embodiment includes vertical frame columns 1 on both sides and horizontal frame beams 2 fixed between the frame columns 1 on both sides. The frame columns 1 and frame beams The angles formed by 2 are reinforced by arm braces 3, and the two ends of arm braces 3 are respectively connected to frame columns 1 and frame beams 2 through gusset plates 4.

[0019] The number of arm braces 3 and the angle of inclination can be determined according to the requirements of the structural design, so that the stress of the structure is reasonable and meets the requirements of the use function. The arm braces 3 and the gusset plate 4 are detachably connected. The setting of the armstay 3 changes the stress mode of the frame. The horizontal component force in the armstay 3 and the internal force of the frame beam 2 form a couple with a larger moment arm, which makes the stress mo...

Embodiment 2

[0020] Embodiment 2: where the arm braces 3 can be arranged in multiples and parallel to each other. Such as figure 2 Shown is a schematic diagram of the structure of one or two layers of unequal two spans to improve the lateral displacement stiffness of the steel frame. In this embodiment, the number of haunches 3 is set to 2, and the two are parallel to each other, and the angle between the frame column 1 and the frame beam 2 is close to The angle between the axis of the arm brace 3 and the axis of the frame column 1 is α 1 , and the angle between the axis of frame beam 2 is α 2 , the angle between the axis of the armpit 3 near the angle between frame column 1 and frame beam 2 and the axis of frame column 1 is α 3 , and the angle between the axis of frame beam 2 is α 4 , where α 1 =α 2 =α 3 =α 4 =45°, the axis of the arm brace 3, the axis of the frame column 1 and the axis of the frame beam 2 form an isosceles right-angled triangle, the lengths of the two right-angle...

Embodiment 3

[0021] Embodiment 3: This structure can be single-span or multi-span, single-layer or multi-layer; multi-span can be equal span or unequal span, and the height of multiple layers can be equal or unequal, and has a wide range of applications, and can be applied to single-span Multi-storey and multi-span buildings can also be applied to single-storey, multi-storey and long-span factory buildings. The arm brace 3 can be I-shaped steel, steel pipe or anti-buckling support, etc. The arm brace 3 and the gusset plate 4 are connected by bolts and other detachable connection methods. The energy-dissipating component is a secondary component for easy replacement and repair, and the cost is lower , and can also maintain the characteristics of a large span. During the construction of this structure, openings are reserved on the frame columns 1 and frame beams 2 to pre-embed the gusset plate 4, and then the two ends of the arm brace 3 are fixed in the gusset plate 4. The construction metho...

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Abstract

The invention relates to a structure for improving the lateral stiffness of a steel frame, and belongs to the technical field of building steel structures. Diagonal members are arranged on frame columns, frame beams and included angle positions of the frame columns and the frame beams, and the diagonal members are connected with the frame columns and the frame beams through gusset plates. The number of the diagonal members, the included angles between the diagonal members and the frame columns and the included angles between the diagonal members and the frame beams can be determined accordingto structural design, so that the stress of the structure is reasonable. The frame structure is flexible in space distribution, reasonable in stress, convenient to construct, the lateral stiffness ofthe frame can be greatly enhanced, and the rigidity and anti-seismic performance are good.

Description

technical field [0001] The invention relates to a structure for improving the lateral stiffness of a steel frame, which belongs to the technical field of building steel structures. Background technique [0002] With the continuous development of science and technology, steel frame structures have begun to be widely used in the construction field. Steel frames have the advantages of flexible space separation, light weight, good for earthquake resistance, material saving, and flexible coordination with building layouts. However, steel frame structures The lateral stiffness is small, and it is a flexible structural frame. Under normal wind loads and frequent earthquakes, the structure has displacement, which affects comfort; Structurally broken. The steel frame is a bar system structure composed of beams and columns, and its bearing capacity and stiffness are low, especially in the horizontal direction (even if it is possible to consider that the cast-in-place floor and the be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/24E04B1/98E04H9/02
CPCE04B1/24E04H9/024
Inventor 双超周东华兰树伟罗勇段斌伍玉宝
Owner KUNMING UNIV OF SCI & TECH